Composite cellulose film.



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COMPUSITE CELLULUSE MLM.

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To all 'whom t may con/ceras" Be it known that ll, JACQUES EDWIN BnANnnNEnenR, a citizen of the Swiss Confederation, and resident 'of Thaon-les- Vosges, France, have inventedl a new and useful Composite Cellulose Film, which'is fully set forth in the following specification.

lt is lrnown to -beimpossible to continu.- ously manufacture by machinery certain lms obtained vfrom viscous materials, moreA particularly gelatin films. Un the other hand, continuous manufacture of cellulose lilms by means of aqueous solution of nitrocellulose,l oHers great diculties, it it is attempted to obtain thick or rigid films.

The process according to4 this invention, consistsin producing in 'a continuous manner4 a lm, the -thiclmess of which can vary' withinl fairly wide limits, by inclosing between two nitro-cellulose films a plastic ma- Iterial such asv gelatin, resin, oil, para-mn,-

rubber, etc.,

The accompanying drawing shows a diagrammatic view ofa form of machine which enables` the new product to be obtained in ,a continuous manner.

'lhismachine chiedy consists of two` cyl- ,inders A and A wluch can be heated by.

steam or in any other way, and the distance lbetween the vsaid. cylinders is adjustable.

'llhe two continuous nitro-cellulose lilms between which the plastic, material must be where they enter the nip ol the cylinders inclosed, are wound on two cylinders D and D. and fed over and between the cylinders A and A between which films at the point A,'A, is introduced the liquid or` pasty plastic materiallE which is to be inclosed. 'lhec'ompound film comprising the two'nitro-cellulose iilms and the plastic material is then' brought'to the series of cylinders B' which may be heated. 'llhe number ot' cylindersand the temperature of heating are regulated by the conditions of solidilication A of the inclosed plastic' material. These cylinders B can either be heated inside or inclosed within a hot chamber. 'lhey must be suciently near one another-teem- -vary greatly able the compound film to readily traverse Patented llllayl, tuile..

all of. the cylinders, and to pass from the last cylinder ina state of complete solidilication without any tearing, to the winding cylinder C. The thickness of the continuous lilm to be obtained, depends on the distance v Accordj between the cylinders A and A. ing to the nature of the cellulose lms employed, and to that of the plastic material v inclosed, products are obtained, which may in appearance from one another; that 1s to say,they may be colored or uncolored, transparent or opaque, plain-'er ribbed, printed or unprinted. @ne of the two films could be even glued toa backing or supporting sheet or strip of paper, fabric, thinmetal etc. possible to introduce into'the plastic material solid substances in the -llorm oil powder, fibers, blades, etc., sov as to obtain Special resul A o llln certain cases where it is desiredvto at-` tain 'a special resultv which'could not be obtained with two nitro-cellulose lms, ithas been found that theY mechanical rocess llere- Y inb'efore described is suitable or superposing two films', only one .of which is in the nature of' nitro-cellulose, with the insertion ola third substance between them. l

`llt ismerely important to select lor the second lmone which is 'capable ot being unwound' in a continuous manner, and through which the plastic material cannot penetrate. By way of example, this second film couldbe a sheet oit' thin metal, paper or fabric. A

ln the' special cases where it may be considered necessary, it willy be ossible, with the process herelnbefore descri duce between the two lms to be superposed, one or more continuous or non-continuous strips of material, for instance fabrics, at

which they would edded. i v

aims :v f

'be em i. il continuous, Elm-like body of inde- Inte length, which comprises continuous,

outer-and inner, solid nitro-cellulosef'lms,

llt is even 'eef d, to intro- .f

eo"- the same time as the lplastic material in f Qv 1,266,766

nitro-cellulose lms; one of said nitro-cellu- In testilnony whereof .I have signed this lose films having a continuous backing strip specification in the p'resence of two sub- 10 pasted thereto. scribing witnesses.

2. A continuous {ihn-like body which i 5 comprises a plastic substance 'solidified be JACQUES EDWIN BRNDENBERGER' tween two continuous, solid films of celu- Witnesses: lose, said plastic ysubstance having sma. par- EMILE LEDRET,

ticles of solid material incorporated therein. CEAS. P. PREssLY. 

